nav{
            position:fixed;top:0;left:0;right:0;z-index:200;
            display:flex;align-items:center;justify-content:space-between;
            padding:0 48px;height:68px;
            background:rgba(19,25,34,.92);backdrop-filter:blur(16px);
            border-bottom:1px solid var(--border);
            box-shadow:var(--sh-xs);
        }
        .nav-logo{display:flex;align-items:center;height:40px}
        .nav-r{display:flex;align-items:center;gap:14px;font-size:13px;font-weight:500}
        .nav-phone{color:var(--t2);transition:color .15s}.nav-phone:hover{color:var(--red)}
        .nav-social{display:flex;align-items:center;gap:6px;background:var(--s0);color:var(--black);padding:8px 14px;border-radius:var(--r8);font-size:12px;font-weight:600;border:1px solid var(--border);transition:border-color .15s,color .15s,background .15s}
        .nav-social svg{width:14px;height:14px;fill:currentColor;flex-shrink:0}
        .nav-social:hover{border-color:var(--black);background:var(--s1)}
        .nav-reg{background:var(--red);color:#fff;padding:9px 22px;border-radius:var(--r8);font-size:12px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;box-shadow:0 2px 8px rgba(209,65,36,.3);transition:background .15s,box-shadow .15s}
        .nav-reg:hover{background:var(--red-d);box-shadow:0 4px 16px rgba(209,65,36,.4)}